The AZ-1 is a 41-note velocity and aftertouch sensitive performance remote keyboard MIDI controller. 2 wheels, 2 switches and 1 slider are user assignable to different MIDI functions. A row of buttons is used to access 128 program change commands. 2 switchable MIDI channels (channel 1-16) allow you to switch between two synths or performances on the fly. There is a layer function too. There are also dedicated sustain,portamento,solo buttons, pitch bend wheel and octave down/normal/up switch. Lightweight and battery-powered. (1986).